contact.updated

{
  "type": "contact.updated",
  "data": {
    "contact_id": "ct_abc123",
    "email": "user@example.com",
    "first_name": "John",
    "last_name": "Doe",
    "unsubscribed": false,
    "updated_at": "2026-03-02T12:30:00+00:00"
  },
  "created_at": "2026-03-02T12:30:00+00:00"
}